/**
 * Created by Administrator on 2019/7/1.
 */
//回到顶部
var tabLI = document.querySelector('.tab');
var bx = document.querySelector('.bingxiang');
var jiu = document.querySelector('.jiu');
var jiao = document.querySelector('.jiugui');

tabLI.onclick=function () {
    if(bx.style.display=='block'){
        bx.style.display='none'
    }else{
        bx.style.display='block'
    }
};
jiu.onclick=function () {
    if(jiao.style.display=='block'){
        jiao.style.display='none'
    }else{
        jiao.style.display='block'
    }
};
